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Wednesday, December 17, 2014

How to identify iPhone GSM or CDMA



Here following is the official list of iPhone GSM and CDMA from Apple :

http://support.apple.com/en-us/HT201296

For those of you who still wondering what is GSM and CDMA (GLOBAL) Here is the description from wiki :

. GSM (Global System for Mobile Communications, originally Groupe Sp├ęcial Mobile), is a standard developed by theEuropean Telecommunications Standards Institute (ETSI) to describe protocols for second-generation (2G) digital cellular networks used by mobile phones. As of 2014 it has become the default global standard for mobile communications - with over 90% market share, operating in over 219 countries and territories

. CDMA (Code division multiple access) is a channel access method used by various radio communication technologies.

CDMA is an example of multiple access, which is where several transmitters can send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth). To permit this without undue interference between the users, CDMA employs spread-spectrum technology and a special coding scheme (where each transmitter is assigned a code).

CDMA is used as the access method in many mobile phone standards such as cdmaOne, CDMA2000 (the 3G evolution of cdmaOne), and WCDMA (the 3G standard used by GSM carriers), which are often referred to as simply CDMA.

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